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You know what my dumbass just realized? Mococo and Fuwawa have the pink and blue color scheme we commonly see on anime girl designs nowadays. Obviously there's Aqua, but you have Ame from Needy Girl, there's Iono, there's Bremerton, there's Riamu's dumbass. I'm sure there's other examples, but this color scheme has been pretty popular for a while.
I basically only noticed this because of Fuwamoco's bau bau emote.